/* カーソルでなぞった文字反転 */
function custom_admin_selection_style() {
    echo '<style>
        ::selection {
            background: #3399ff !important;
            color: white !important;
        }
    </style>';
}
add_action('admin_head', 'custom_admin_selection_style');<br />
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<br />
<b>Warning</b>:  Cannot modify header information - headers already sent by (output started at /usr/home/hbv10033b5hj/html/blog/wp-content/themes/fcblog/functions.php:42) in <b>/usr/home/hbv10033b5hj/html/blog/wp-includes/rest-api/class-wp-rest-server.php</b> on line <b>1775</b><br />
<br />
<b>Warning</b>:  Cannot modify header information - headers already sent by (output started at /usr/home/hbv10033b5hj/html/blog/wp-content/themes/fcblog/functions.php:42) in <b>/usr/home/hbv10033b5hj/html/blog/wp-includes/rest-api/class-wp-rest-server.php</b> on line <b>1775</b><br />
<br />
<b>Warning</b>:  Cannot modify header information - headers already sent by (output started at /usr/home/hbv10033b5hj/html/blog/wp-content/themes/fcblog/functions.php:42) in <b>/usr/home/hbv10033b5hj/html/blog/wp-includes/rest-api/class-wp-rest-server.php</b> on line <b>1775</b><br />
<br />
<b>Warning</b>:  Cannot modify header information - headers already sent by (output started at /usr/home/hbv10033b5hj/html/blog/wp-content/themes/fcblog/functions.php:42) in <b>/usr/home/hbv10033b5hj/html/blog/wp-includes/rest-api/class-wp-rest-server.php</b> on line <b>1775</b><br />
<br />
<b>Warning</b>:  Cannot modify header information - headers already sent by (output started at /usr/home/hbv10033b5hj/html/blog/wp-content/themes/fcblog/functions.php:42) in <b>/usr/home/hbv10033b5hj/html/blog/wp-includes/rest-api/class-wp-rest-server.php</b> on line <b>1775</b><br />
<br />
<b>Warning</b>:  Cannot modify header information - headers already sent by (output started at /usr/home/hbv10033b5hj/html/blog/wp-content/themes/fcblog/functions.php:42) in <b>/usr/home/hbv10033b5hj/html/blog/wp-includes/rest-api/class-wp-rest-server.php</b> on line <b>1775</b><br />
{"id":43,"count":1,"description":"","link":"https:\/\/www.flatcord.co.jp\/blog\/tag\/%e7%ad%91%e6%b3%a2%e5%ae%87%e5%ae%99%e3%82%bb%e3%83%b3%e3%82%bf%e3%83%bc","name":"\u7b51\u6ce2\u5b87\u5b99\u30bb\u30f3\u30bf\u30fc","slug":"%e7%ad%91%e6%b3%a2%e5%ae%87%e5%ae%99%e3%82%bb%e3%83%b3%e3%82%bf%e3%83%bc","taxonomy":"post_tag","meta":[],"_links":{"self":[{"href":"https:\/\/www.flatcord.co.jp\/blog\/wp-json\/wp\/v2\/tags\/43"}],"collection":[{"href":"https:\/\/www.flatcord.co.jp\/blog\/wp-json\/wp\/v2\/tags"}],"about":[{"href":"https:\/\/www.flatcord.co.jp\/blog\/wp-json\/wp\/v2\/taxonomies\/post_tag"}],"wp:post_type":[{"href":"https:\/\/www.flatcord.co.jp\/blog\/wp-json\/wp\/v2\/posts?tags=43"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}